Benjamin Mayo, writing for 9 to 5 Mac:

Reliable Apple analyst Ming-Chi Kuo at KGI securities is today reporting that they believe the iPhone 7 Plus will come with a dual-camera system option with Linx camera technology Apple acquired last year. By using two distinct lenses, Apple can use the additional image data to create substantially better quality photos. Dual camera iPhones have been rumored for a long time. KGI also floats the possibility that the Plus will feature an optical zoom, with 2-3x magnification.

If true, this will be a major leap forward for the iPhone camera’s picture quality.